I have written a spreadsheet that can be used to estimate quantities of sand/cement etc required for render/screed. The numbers in the boxes can be changed to allow for different materials mixes etc. Let me know if I have made any errors!!(I'm sure you will)
Hope it is of use
David
Mix Estimator Excel spreadsheet
or
Zip file containing spreadsheet
Hope it is of use
David
Mix Estimator Excel spreadsheet
or
Zip file containing spreadsheet